Thomas gray



THOMAS GRAY, or UNION no AD, ENGLAND. Letters Patent No.

63,036, dated film-ch 19, 1867.

MANUFACTURE OF BLEACHIN G POWDER.

IMPROVEMENT IN THE (the firlgrhnln trirtrrh ft in time Z'Frttrrs fiatrnt ililD-lllillilllfl and of the-smut.

1 "to ALL WHOM IT MAY concea s:

Be it known that I, TIIoMAs GRAY, of Union Road, W nvented a new and improved Method of Preparing and Ma pounds; and I do hereby declare that the followingis a full l manufacturing the same.

andswor'th, in the count nnl'acturing Bleaching and exact description y of Surrey, England, have of the mode of preparing and i be present it will be'inert. l I have discovered various Ways of effecting this object but the t depend upon the circumstancesof the case to be treated.

The ordinary method of manufacturing bleaching irine gas; but as this nearly always contains free acid, through a solution of caustic soda in water before all lbrought in contact with the lime'. 7

Sometimes it will he found more convenient to mix the soda-ash, ground lime, so that when the chlorine gas is brought to th or caustic alkali, andlthus remain inert in the-compound.

As a modification of this latter process, the soda ash or i'pulverized state with bleachinmpowder or chloride of lime D What I claim as my and desire to secure by one of my processes consists in passing the chlorine gas owing it to enter the chamber i caustic soda, or other alkali, with the, e lime the free acid may combine xvith'the soda ashf other caustic alkali may be made in the ordinary manner, Letters Patent, is-' caching fabrics, or fibres,

invention, The application, as before stated, for the'purposes of bl or other materials, without" destroying or injuring them, substantially as described.

THOMAS GRAY.

Witnesses:

JOSHUA NUNN, 2O .Notjfollc Terrace. F. W. ATKINSON.

Powders, Materials and Com-- 'powder consists in impregnating ground lime with chlo- I r or vessel in which it is l intimately mixed in a 

